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<H3><A NAME="SECTION003042300000000000000">
Identify the lines in one of the rows of the spectrum</A>
</H3>
<P>
Different parameters are used, indicated in the following
fields of the Main window:
<P>
<UL>
<LI>the name of the table with the wavelengths of the comparison lines,
indicated in the field <B>Line Catalog</B>.
<LI>the range in wavelengths to be considered, indicated in
<B>Wavelength Range</B>
<LI>the <B>Minimal Intensity in Catalog</B> is used to perform
a selection of the brightest lines of the catalog
<LI>and the <B>Calibration Starting Row</B> will be used for
the lines identifications. If this parameter is set to
its default value 0, the central row will be considered.
</UL>
<P>
After setting these parameters, click the
<!-- MATH: $\fbox{\tt Identify...}$ -->
<IMG
WIDTH="140" HEIGHT="32" ALIGN="BOTTOM" BORDER="0"
SRC="img1075.gif"
ALT="\fbox{\tt Identify...}">
button.
to pop up the Identify window. The menu
<!-- MATH: $\fbox{\tt Utils}$ -->
<IMG
WIDTH="71" HEIGHT="27" ALIGN="BOTTOM" BORDER="0"
SRC="img1076.gif"
ALT="\fbox{\tt Utils}">
in the menu bar provides graphic related commands. The identification
starts by clicking on
<!-- MATH: $\fbox{\tt begin}$ -->
<IMG
WIDTH="71" HEIGHT="32" ALIGN="BOTTOM" BORDER="0"
SRC="img1077.gif"
ALT="\fbox{\tt begin}">,
which plots one row of the
spectrum in the graphic window, indicates the position of the detected
arc lines with blue vertical traces and gives a cursor.
<P>
When a detected
line is clicked on, the interface expects the corresponding wavelength
to be clicked in the wavelength list. The identified line turns green and
an identification message appears in the MIDAS monitor. It
is then possible to identify a new line. When a sufficient number of
identifications has been performed, clicking with the middle
mouse button in the graphic window desactivates the cursor.
The full spectrum is plotted by default. Clicking again on
<!-- MATH: $\fbox{\tt begin}$ -->
<IMG
WIDTH="71" HEIGHT="32" ALIGN="BOTTOM" BORDER="0"
SRC="img1078.gif"
ALT="\fbox{\tt begin}">
deletes
all identification, while more identification can be added by clicking
on
<!-- MATH: $\fbox{\tt continue}$ -->
<IMG
WIDTH="106" HEIGHT="27" ALIGN="BOTTOM" BORDER="0"
SRC="img1079.gif"
ALT="\fbox{\tt continue}">.
Identifications can also be removed one by one
with the button
<!-- MATH: $\fbox{\tt delete}$ -->
<IMG
WIDTH="83" HEIGHT="27" ALIGN="BOTTOM" BORDER="0"
SRC="img1080.gif"
ALT="\fbox{\tt delete}">.
<P>
The x-axis and
y-axis limits of the plot can be modified interactively
with the menu
<!-- MATH: $\fbox{\tt Frame}$ -->
<IMG
WIDTH="71" HEIGHT="27" ALIGN="BOTTOM" BORDER="0"
SRC="img1081.gif"
ALT="\fbox{\tt Frame}">.
The Begin button sets the x-axis to
default values in order to start each time from a predictible
configuration. The Continue button however will take the defined
limits. The procedure to ideintify lines in zoomed areas of the
spectrum is therefore:
<P>
<UL>
<LI>start with Begin
<LI>if you identified no line, simply exit with the middle button of the mouse
<LI>select new limits in x and y.
<LI>make more identifications with Continue
</UL>
<P>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<DIV ALIGN="CENTER"><A NAME="fig:xident"> </A><A NAME="27952"> </A>
<TABLE WIDTH="50%">
<CAPTION><STRONG>Figure G.4:</STRONG>
Lines Identification Window</CAPTION>
<TR><TD></TD></TR>
</TABLE>
</DIV>
<BR>
<P>
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<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
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